8597049991 has 4 divisors (see below), whose sum is σ = 9102758832. Its totient is φ = 8091341152.

The previous prime is 8597049977. The next prime is 8597049997. The reversal of 8597049991 is 1999407958.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8597049991 - 2⁵ = 8597049959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8597049997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252854395 + ... + 252854428.

It is an arithmetic number, because the mean of its divisors is an integer number (2275689708).

Almost surely, 2^8597049991 is an apocalyptic number.

8597049991 is a deficient number, since it is larger than the sum of its proper divisors (505708841).

8597049991 is a wasteful number, since it uses less digits than its factorization.

8597049991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505708840.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The square root of 8597049991 is about 92720.2782081676. The cubic root of 8597049991 is about 2048.5653250411.

The spelling of 8597049991 in words is "eight billion, five hundred ninety-seven million, forty-nine thousand, nine hundred ninety-one".